JPH0586884B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for producing a hollow molded body of a hydraulic material incorporating a reinforcing material.

[Conventional technology]

Hydraulic substances such as cement, mixtures of silicic and calcareous raw materials, semi-hydrated or molded anhydrite,
Molded bodies reinforced with reinforcing fibers such as asbestos, pulp, and organic synthetic fibers and formed into a shape having hollow holes extending through them in the length direction are used as interior and exterior materials.

This molded body is made by kneading hydraulic substances, reinforcing fibers, water, and if necessary thickeners, pigments, etc., to form a base, extruding this base using a screw type or piston type extruder, and applying it to a spretzer. The cross section is approximately approximate to the outer circumference of the cross section of the product, and after passing through a die with a core inside, it is cut to a predetermined length, and the cut uncured molded product is cured in natural, steam or autoclave. It is cured and made into a product.

Further, in order to increase the strength of the above-mentioned molded body, particularly the bending and impact strength, hollow molded bodies of hydraulic materials are also manufactured which incorporate reinforcing materials such as wire mesh and reinforcing bars.

The conventional manufacturing method for the above-mentioned molded product is to connect two extrusion molding machines in a Y-shape, and insert a reinforcing material along a guide from the extruder side of this connection (for example, 92808), and a modification of the above method using only one extrusion molding machine (for example, JP-A-59
-112068) is known.

[Problem to be solved by the invention]

However, in the conventional method, the insertion position of the reinforcing material shifts due to the pressure of the base material, making it impossible to ensure a sufficient covering thickness.

In addition, the reinforcing material passes through a cap with a core, and the core is attached to the cap using vertical or horizontal mounting brackets, and these mounting brackets are made of strong material to withstand the flow of the substrate. Therefore, the inserting position of the reinforcing material is restricted, and in particular, it is completely impossible to insert the reinforcing material completely surrounding the hollow part of the molded body.

The present invention has a built-in reinforcing material that can ensure a sufficient covering thickness without shifting the insertion position of the reinforcing material, is not limited to the insertion position of the reinforcing material, and can completely surround a hollow part. It is an object of the present invention to provide a method for producing a hollow molded body of a hydraulic material and an apparatus therefor.

[Means to solve the problem]

In order to achieve the above object, the method of the present invention includes:
A steel conveyor connected to an extruder and arranged in the extrusion direction of a die with a core is used as the lower frame, and a formwork with an openable upper frame and side frames is used, and the upper frame and side frames are opened and reinforced. After mounting the material on the reinforcing material support provided in the core and placing it in the position where the formwork will be assembled, the upper frame and side frames are closed and the formwork is assembled, and the hydraulic material is placed inside the assembled formwork. By filling the base material, the base material is formed and integrated with the reinforcing material, and the uncured molded body is cut from the unformed base material.
This is a method in which the upper frame and side frames are opened and separated from the uncured molded product, the steel conveyor is rotated to remove the uncured molded product from the upper frame and the side frames, and then the uncured molded product is cured. The apparatus of the invention includes: an extruder for extruding a hydraulic base material; a spreader connected to the extruder for approximating the cross-sectional outer circumferential shape of the base material to the cross-sectional outer circumferential shape of the product; A die having a preform frame for preforming the cross-sectional outer circumferential shape of the product and a core for forming the hollow part of the uncured molded body; A steel conveyor for conveying the uncured molded body; and Extrusion of the side part of the preform frame. A side formwork is disposed with a gap in the direction, and is in slidable contact with the upper surface of the steel conveyor in a direction perpendicular to the extrusion direction, and forms both sides of the uncured molded body: an upper part of the preform formwork; an upper formwork disposed with a gap in the extrusion direction of the side formwork, which contacts the upper surface of the side formwork to form the upper surface of the uncured molded product; and a side formwork provided at the end of the upper formwork in the extrusion direction. An upper member that is movable up and down, consisting of an end in the extrusion direction of the steel conveyor and an end mold that contacts the upper surface of the steel conveyor to form the end in the extrusion direction of the uncured molded product and has a degassing hole. A reinforcing material holder is provided to mount the reinforcing material in the space surrounded by the steel conveyor, the side formwork, and the upper member. an upper cutter for cutting the steel conveyor; a side cutter for cutting the substrate and the uncured molded body, which is provided so as to be able to enter and leave the gap from the side; a support plate for slidingly supporting the steel conveyor from below; and an upper member. a pedestal having a blocking plate that comes into contact with an end in the extrusion direction of the preform and prevents movement of the upper member in the extrusion direction; A device having a space into which a steel conveyor enters, an inner frame in which the reinforcing material support surrounds the core and is slidably fitted to the core, and the end formwork is the inner frame. A device or reinforcement support having an opening capable of discharging
The device may be a movable protrusion that protrudes from the upper surface of the core, fits into the core due to the pressing force of the hydraulic base, and can return to its original state when the pressing force of the hydraulic base is removed.

[Effect]

A substrate in which the reinforcing material does not pass through the die, but is attached to a reinforcing material support provided on the core downstream from the die of the substrate in the extrusion direction, and is press-fitted into a formwork that surrounds the reinforcing material and is assembled to be openable. Since the reinforcing material is integrally molded with the reinforcing material, it is possible to ensure a sufficient covering thickness without shifting the insertion position, and there is no restriction on the insertion position, and in particular, the reinforcing material can be built in completely surrounding the hollow part.

〔Example〕

The present invention will be explained with reference to drawings showing embodiments.

Fig. 1 is a schematic vertical cross-sectional view of an embodiment in which a screw type extruder is used as the extruder and an inner frame is used as the reinforcing material support; The figure is a schematic diagram taken along the line B-B in Figure 1, Figure 4 is an explanatory diagram showing how the inner frame is ejected in the device shown in Figure 1, and Figure 5 is an explanatory diagram showing the operation of the cutter. The formwork 9 serves as an upper frame, the side formworks 8a and 8b and the end formwork 11 serve as side frames, and the steel conveyor 6 serves as a lower frame to form a formwork.

Next, a manufacturing method using the above device will be explained.

Pull up the upper member 12 and remove the side formwork 8.
a and 8b were slid laterally on the steel conveyor 6 to open the formwork, and a reinforcing material (wire mesh) 21 was attached to the outer periphery of the inner frame 19a, and the inner frame 19a was slidably fitted to the core 4. Afterwards, the side forms 8a and 8b contact the upper surface of the steel conveyor 6 that conveys the uncured molded body 23 through a gap 7 in the extrusion direction of the side part of the preform 3, and move in a direction perpendicular to the extrusion direction. and is fixed at a position where both sides of the uncured molded body 23 can be molded.

The upper member 12, which is vertically movable, has a gap 7 in the extrusion direction of the upper part of the preform 3, and the upper formwork 9 and the end formwork 11 are connected to the upper surface and the extrusion direction end of the side formworks 8a and 8b, respectively. At the same time, the end formwork 11 is fixed against the steel conveyor 6, and the formwork is assembled and closed.

cement. For hydraulic substances such as mixtures of silicic raw materials and calcareous raw materials, semi-hydrous or molded anhydrite,
The base material is made by adding reinforcing fibers such as asbestos, pulp, and organic synthetic fibers, thickeners such as methyl cellulose and polyvinyl alcohol, and pigments such as titanium yellow and red iron, and adding water and kneading them. It is extruded into a cylindrical shape by an extruder 1.

The extruded cylindrical material is passed through a spreader 2 whose cross-sectional outer circumferential shape approximates the cross-sectional outer circumferential shape of the product, and then a preforming frame is used to preform the cross-sectional outer circumferential shape of the material into the cross-sectional outer circumferential shape of the product. 3 and a core 4 for forming the hollow part of the uncured molded body 23.

The preformed substrate is conveyed on a steel conveyor 6,
The material is pushed out into the space surrounded by the side formworks 8a, 8b and the upper member 12, and fills this space while expelling the inner frame 19a from the formwork through the opening 20, so that the material is completely filled in this space and is not cured. When the molded body 23 is molded, the operation of the extruder 1 is stopped.

Upper cutter 13 and side cutters 14a, 14
b enters the gap 7 from the top and the sides, cuts the base material and the uncured molded body 23, and then leaves and returns to the original position.

The upper member 12 is pulled upward and the side formwork 8
a and 8b slide laterally on the steel conveyor 6, leaving the uncured molded body 23 and returning to their original positions.

The steel conveyor 6 is operated in the direction of the arrow, and the uncured molded body 23 is also separated from the core 4 and conveyed.

After the uncured molded body 23 is transported, the reinforcing material 21 is attached to the outer periphery of the inner frame 19 again, and the core 4 is
The side formworks 8a, 8b and the upper member 12 are fixed in predetermined positions, the base material is extruded from the base 5, and the above operation is repeated.

Sliding and fixing of side forms 8a and 8b, upper member 1
The vertical movement and fixation of the cutter 2 and the entry and removal of the upper cutter 13 and the side cutters 14a and 14b are performed by an appropriate drive device such as a cylinder, piston, pinion, rack, etc.

As the reinforcing material 21, a reinforcing bar or the like having a shape other than wire mesh may be used, and it can be placed at any position between the core 4 and the outer periphery of the uncured molded body 23. Or hardened by autoclave curing.

FIG. 6 is a perspective explanatory view of a movable protrusion used as a reinforcing member support in another embodiment of the present invention.

A plurality of movable protrusions 19b are provided on the upper surface of each core 4, and reinforcing members (reinforcing bars in the figure) 21 are mounted at predetermined positions within the formwork.

When the base material is filled up to the position of the movable protrusion 19b that frames the reinforcing material 21, the movable protrusion 19 fits into the core 4 due to the pressing force of the base material, and does not become an obstacle to the filling of the base material. The reinforcing material 21 is held by the filled material without shifting from the position where it was mounted on the movable protrusion 19b.

By using the movable protrusion 19b, the inner frame 19a
Compared to the case where a plurality of cores are used, reinforcing materials can also be built into the base material between the cores.

The manufacturing procedure when using the movable protrusion 19b is the same as when using the inner frame 19a, except for sliding insertion and ejection of the inner frame 19a.

〔Effect of the invention〕

Since the present invention is configured as described above, it has the effects described below.

Since the reinforcing material does not pass through the die and is supplied by being mounted on the reinforcing material support provided in the core downstream in the extrusion direction, the built-in position of the reinforcing material does not shift and the covering thickness can be ensured. There are no restrictions on the insertion position of the reinforcing material.

By making the reinforcing material support an inner frame that surrounds the core and is slidably fitted to the core, the reinforcing material can be inserted surrounding the core, and the reinforcing material support is a movable protrusion that protrudes from the top surface of the core, fits into the core due to the pressing force of the base material, and returns to its original state when the pressing force of the base material is removed.When using multiple cores, the core and the core Reinforcements can also be inserted into the substrate between the children.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional schematic diagram showing a state in which the upper frame and side frame are assembled after the reinforcing material of the embodiment using a screw-type extruder as the extruder and the inner frame as the reinforcing material support has been mounted. , Figure 2 is A of Figure 1.
- A schematic diagram in the direction of arrow A, FIG. 3 is a schematic diagram in the direction of the B-B arrow in FIG. FIG. 6 is a perspective explanatory view of a movable protrusion in another embodiment of the present invention. 1... Extruder, 2... Spreader, 3... Preform frame, 4... Core, 5... Mouthpiece, 6... Steel conveyor, 7... Gap, 8a, 8b... Side formwork, 9... Upper formwork, 10... Deaeration hole, 11...
End formwork, 12... Upper member, 13... Upper cutter, 14a, 14b... Side cutter, 15... Support plate, 16... Blocking plate, 17... Frame, 18...
Space part, 19a...inner frame, 19b...movable projection,
20... Opening, 21... Reinforcement material, 22... Base material,
23...Uncured molded body.

Claims (1)

[Scope of Claims] 1. A steel conveyor connected to an extruder and disposed in the extrusion direction of a die having a core is used as a lower frame, and a formwork with an openable upper frame and side frames is used, and the upper frame and After opening the side frame and placing the reinforcing material on the reinforcing material support provided in the core and placing it in the position where the formwork will be assembled, the upper frame and side frame are closed and the formwork is assembled. By filling the hydraulic base material into the molded formwork, the base material is formed and integrated with the reinforcing material, the uncured molded body is cut from the unformed base material, the upper frame and side frames are opened, and the uncured base material is formed. A method for manufacturing a hollow molded body of a hydraulic material having a built-in reinforcing material, which is separated from the molded body, rotates a steel conveyor to separate the uncured molded body from the upper frame and the side frame, and then cures the uncured molded body. . 2 An extruder 1 that extrudes a hydraulic base material: A spreader 2 connected to the extruder 1 and that approximates the cross-sectional outer circumferential shape of the base material to the cross-sectional outer circumferential shape of the product.
and: A preforming frame 3 connected to the spreader 2 and used to preform the cross-sectional outer circumferential shape of the substrate into the cross-sectional outer circumferential shape of the product; and a core 4 for forming the hollow part of the uncured molded product.
a base 5 having: a steel conveyor 6 for conveying the uncured molded body;
and: Arranged through a gap 7 in the extrusion direction on the side of the preforming frame 3, abuts on the upper surface of the steel conveyor 6 so as to be able to slide in a direction perpendicular to the extrusion direction, and forms both sides of the uncured molded body. The side forms 8a, 8b are disposed at the upper part of the preform form 3 with a gap 7 in the extrusion direction, and come into contact with the upper surfaces of the side forms 8a, 8b to form the upper surface of the uncured molded product. An upper formwork 9 and a side formwork 8 provided at the end of the upper formwork 9 in the extrusion direction.
a, 8b in the extrusion direction and an end formwork 11 that abuts the upper surface of the steel conveyor 6 to form the extrusion direction end of the uncured molded body and has a degassing hole 10, and is movable up and down. member 12: a reinforcing material holder 19 provided on the core 4 and mounting a reinforcing material in a space surrounded by the steel conveyor 6, side forms 8a, 8b, and upper member 12; Designed to allow for easier entry and exit,
Upper cutter 13 for cutting the substrate and the uncured molded body
and: Provided so that it can enter and leave the gap 7 from the side,
Side cutter 14 for cutting the substrate and the uncured molded body
a, 14b: A frame having a support plate 15 that slides and supports the steel conveyor 6 from below, and a blocking plate 16 that abuts the end of the upper member 12 in the extrusion direction and prevents the upper member 12 from moving in the extrusion direction. 17 and: the extrusion direction end of the bottom of the preforming frame 3 and the support plate 15
An apparatus for manufacturing a hydraulic material hollow molded body having a built-in reinforcing material, which has a space 18 into which a steel conveyor 6 enters between the extruder and the end in one direction of the extruder. 3. The reinforcing material support 19 is an inner frame that surrounds the core 4 and is slidably fitted to the core 4,
3. The apparatus for producing a hydraulic material hollow molded body incorporating a reinforcing material according to claim 2, wherein the end frame 11 has an opening 20 through which the inner frame can be discharged. 4. The reinforcing material support 19 is a movable protrusion that protrudes from the upper surface of the core 4, fits into the core 4 due to the pressing force of the base material, and can be restored when the pressing force of the base material is removed. Manufacturing equipment for hollow molded hydraulic material with built-in reinforcing material.